SigmaHQ/rules/windows/builtin/win_account_backdoor_dcsync_rights.yml

title: Powerview Add-DomainObjectAcl DCSync AD Extend Right
id: 2c99737c-585d-4431-b61a-c911d86ff32f
description: backdooring domain object to grant the rights associated with DCSync to a regular user or machine account using Powerview\Add-DomainObjectAcl DCSync
    Extended Right cmdlet, will allow to re-obtain the pwd hashes of any user/computer
status: experimental
date: 2019/04/03
modified: 2020/08/23
author: Samir Bousseaden; Roberto Rodriguez @Cyb3rWard0g; oscd.community
references:
    - https://twitter.com/menasec1/status/1111556090137903104
    - https://www.specterops.io/assets/resources/an_ace_up_the_sleeve.pdf
tags:
    - attack.persistence
    - attack.t1098
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 5136
        LDAPDisplayName: 'ntSecurityDescriptor'
        Value|contains: 
         - '1131f6ad-9c07-11d1-f79f-00c04fc2dcd2'
         - '1131f6aa-9c07-11d1-f79f-00c04fc2dcd2'
         - '89e95b76-444d-4c62-991a-0facbeda640c'
    condition: selection
falsepositives:
    - New Domain Controller computer account, check user SIDs witin the value attribute of event 5136 and verify if it's a regular user or DC computer account.
level: critical
Create win_account_backdoor_dcsync_rights.yml 2019-04-03 14:16:05 +00:00			`title: Powerview Add-DomainObjectAcl DCSync AD Extend Right`
Added UUIDs to rules 2019-11-12 22:12:27 +00:00			`id: 2c99737c-585d-4431-b61a-c911d86ff32f`
			`description: backdooring domain object to grant the rights associated with DCSync to a regular user or machine account using Powerview\Add-DomainObjectAcl DCSync`
			`Extended Right cmdlet, will allow to re-obtain the pwd hashes of any user/computer`
Create win_account_backdoor_dcsync_rights.yml 2019-04-03 14:16:05 +00:00			`status: experimental`
			`date: 2019/04/03`
att&ck tags review: windows/builtin, windows/driver_load, windows/file_event, windows/image_load, windows/other 2020-08-24 23:09:17 +00:00			`modified: 2020/08/23`
add win_ad_object_writedac_access.yml, sysmon_createremotethread_loadlibrary.yml, sysmon_rdp_registry_modification.yml; modified win_account_backdoor_dcsync_rights.yml 2019-10-24 12:34:16 +00:00			`author: Samir Bousseaden; Roberto Rodriguez @Cyb3rWard0g; oscd.community`
Create win_account_backdoor_dcsync_rights.yml 2019-04-03 14:16:05 +00:00			`references:`
			`- https://twitter.com/menasec1/status/1111556090137903104`
			`- https://www.specterops.io/assets/resources/an_ace_up_the_sleeve.pdf`
			`tags:`
			`- attack.persistence`
att&ck tags review: windows/builtin, windows/driver_load, windows/file_event, windows/image_load, windows/other 2020-08-24 23:09:17 +00:00			`- attack.t1098`
Create win_account_backdoor_dcsync_rights.yml 2019-04-03 14:16:05 +00:00			`logsource:`
			`product: windows`
			`service: security`
			`detection:`
			`selection:`
			`EventID: 5136`
			`LDAPDisplayName: 'ntSecurityDescriptor'`
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml 2019-11-10 15:43:41 +00:00			`Value\|contains:`
			`- '1131f6ad-9c07-11d1-f79f-00c04fc2dcd2'`
			`- '1131f6aa-9c07-11d1-f79f-00c04fc2dcd2'`
			`- '89e95b76-444d-4c62-991a-0facbeda640c'`
Create win_account_backdoor_dcsync_rights.yml 2019-04-03 14:16:05 +00:00			`condition: selection`
			`falsepositives:`
			`- New Domain Controller computer account, check user SIDs witin the value attribute of event 5136 and verify if it's a regular user or DC computer account.`
			`level: critical`